Fever Detectors for Personal Defense?
(There's a shortage of detailed text in this page used in a live presentation)
- Until the Covid-19 Vaccine is available in 12-18 months, we are all at risk.
- Early statistics suggest the death rate from Corona is 20 times that of the Flu.
- 50 Million were quarantined by the Chinese government, some dragged out of their homes.
- World Health Organization provided test kits to 60 countries, the U.S. declined.
- 124 hospital workers Quarantined after 1 Corona related case was treated at their Hospital.
- U.S. needs 10X the existing number of ventilators (700k) and 2X intensive care beds.
Feeling feverish, or has an actual measured temperature of 100.4°F [38° C] or higher)
One means of mass Infection screening is, Fever Temperature Detection using a Thermal Camera.
Airports have used these systems to screen passengers during several infectious diseases outbreaks.
There may be an entrepreneurial opportunity and perhaps legitimate need for personal fever detectors to identify sick people in one on one encounters.
- Perhaps a small device one wears.
- An old fashioned paper card time-clock (that does not require one to touch the box)
- Or a Ring Doorbell like device that adds intelligent thermal imaging.
Low cost IR / thermal cameras technology examples
uses: Melexis MLX90640 Sensor: $46.34
32x24 (768 elements) Range: -40 to 300°C, accuracy: 1° to 1.5°, FOV: 55°x35° or 110°x75°
Brief "People Detecting demo" video of MLX90640 (linear interpolation makes 66x40 pixels)
M5StickT ESP32 Thermal Camera Development Kit (using 160x120 Lepton 3.0) $429.00
FLIR Lepton 3.5 Sensor: 160X120, Thermal sensitivity: < 50 mK (0.050˚C) $189-$199
FLIR ONE Pro LT 80x60 4,800 pix $299.99 Thermal Sensitivity/NETD 100mK
FLIR ONE Pro 160x120 19,200 pix $399.99 Thermal Sensitivity/NETD 70mK
Accuracy ±3°C, Spot meter resolution 0.1° F, Frame Rate 8.7 Hz
FLIR Handheld Thermal Camera Index
FLIR 12 Things You Should Know Before Buying a Thermal Camera
Pinpoint Accurate Skin Temperature Measurement from infraredcameras.com
SeeK Thermal.com One more Thermal Camera maker, offering OEM camera modules, ass well as cell phone add-ons and self contained cameras. Based in Santa Barbara.
Elevated Body Temperature Detector - app note PDF
Single pixel IR thermo sensors, with Medical calibration Used in non-contact IR thermometers.
Melexis MLX90632 3mm SMD thermometer IC $16 (deliveries delayed 6 months)
Medical grade: object temperatures between -20 °C and 100 °C with an accuracy of ±0.2° C in the human body temperature range, 50° field of view.
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| Here's a medical grade sensor wired up for the M5stickC (they offer a Hat using a cheap lower grade version) |
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| Schematic for the Simple M5stickC Hat recreated above |
Example Airport Fever Screening Thermographic Camera Systems
Test0: From Ebola to Coronavirus: Fever measurement with the testo 890 thermal imager
Testo System above uses the model 885 camera, resolution 320x240, thermal sensitivity < 30 mK, Testo 885-2-DELUXE $11,936.00
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| Satir Brand Fever Detection System |
Satir System Installation
FevIR Scan Fever Screening System
Compact IR Fever Screening System on Office Chair Wheels
Vietnam airport introduces thermal scanner as coronavirus concern rises | AFP Jan 21, 2020
How smarter AI-powered cameras can mitigate the spread of Wuhan Novel Coronavirus (COVID-19)
Tech That Scans People For Fever In Big Demand Amid Coronavirus Crisis, Boosting Wuhan Company
AVIO: Body Surface Temperature Screening with Alarm Function
Asia on alert with thermal cameras 2014
Reality of Fever Measurement as a Corona carrier detection tool.
NY Times:
Thermal guns tend to be unreliable outside of carefully controlled health care settings
‘Thermometer Guns’ on Coronavirus Front Lines Are ‘Notoriously Not Accurate’
NY Times: Two asymtomatic carriers were not effected by the disease
How effective is thermal scanning at airports? 30 January 2020
Thermal scanning at airports detects less than 1 in 5 passengers arriving from a 12 hour flight who are infected with the new coronavirus, according to preliminary estimates from the London School of Hygiene & Tropical Medicine (LSHTM).
Online (statistical) Tool: Effectiveness of airport-based interventions at detecting travellers and delaying an outbreak of COVID-19 (formerly 2019-nCoV)
CNN Can an Infrared Camera Help Detect Ebola (or Coronavirus)? Maker interview video 2015
Non-Contact Thermometers for Detecting Fever: A Review of Clinical Effectiveness
Survery of Non-contact infrared thermometers 2014
FDA issues warning letter to clinic illegally marketing unapproved thermography device, warns consumers to avoid using thermography devices to detect breast cancer"
NIH: Comparison of 3 Infrared Thermal Detection Systems and Self-Report for Mass Fever Screening 2010
Non-contact Infrared thermometer in Epidemics PDF
Thermal Camera Tutorials and Tech info
36 FREE to view online tutorial videos - on a paid certification site: Infrared Training CenterWorthwhile WIKI page on Thermography
In uncooled detectors the temperature differences at the sensor pixels are minute; a 1 °C difference at the scene induces just a 0.03 °C difference at the sensor. The pixel response time is also fairly slow, at the range of tens of milliseconds.
Stupid Thermal Imaging Tricks - video
Qualitative Vs Quantitative Infrared Cameras PDF
Basic Principles of Non-Contact Temperature Measurement - in depth scientific examination
The PDF has a giant table of material Emissivity
Emissivity: Understand the difference between apparent, actual IR temps
FLIR: How Does Emissivity Affect Thermal Imaging?
(Human skin is near the top of the emissivity scale at 0.98)
Use Low-Cost Materials to Increase Target Emissivity (of shiny metal, etc.)
Color Mapping Pallete demo videos
Photonics Encyclopedia, IR Cameras
* Best practices for standardized performance testing of infrared thermographs intended for fever screening
CDC paper reports that IR/thermal cameras (IRTs) are less accurae than non-contact IR thermometers (NCITs), but inner canthi (eye duct near nose) temperatures, (more suitable for IRTs) are more reliable than forehead temperatures taken with NCITs.
Thermal Camera Calibration
Can I perform a thermal camera calibration myself?
FLIR: How Do You Calibrate a Thermal Imaging Camera? & Checking Calibration in the field
Using Blackbody Radiation in Thermal Imaging and Calibrating
Calibration of uncooled thermal infrared cameras PDF
Calibration and Measurement Procedures for a High Magnification Thermal Camera PDF
obscure but includes interesting background info. 2015
Carbon nanotube (CNT) forest blackbody sheets.
Human Body Temperature Measurement System (HBTMS) Calibration Source
Wahl portable Reference Blackbody (10 year old design)
Development and deployment of Infrared Fever Screening Systems
Screening Thermographs Standard: IEC 80601-2-59:2017
Performance testing of infrared thermographs intended for fever screening 2018
Using IR Cameras To Detect Fever Due To SARS 2004
Fever screening of seasonal influenza patients using a cost-effective thermopile array with small pixels for close-range thermometry 2014
Fever screening and infrared thermal imaging: concerns and guidelines PDF 2009
WIRED: Testing the Accuracy of the FLIR One 2014
- FLIR One = +/- 2°C
- Digital thermometer = +/- 1°C
- Mercury thermometer = +/- 0.5°C
Typical $99 "Forhead" non-contact IR Thermometer Specs (FT376)
❁ Measuring Distance: 0.5 – 2 inch/1 - 5 cm
❁ Accuracy: ±0.6°F | ±0.3°C
❁ Resolution: 0.1°F | 0.1°C
Medical Reference Material
Official U.S. Information Site: Coronavirus.gov
Early Transmission Dynamics in Wuhan, China, of Novel Coronavirus–Infected Pneumonia Jan 29, 2020
We analyzed data on the first 425 confirmed cases in Wuhan...
Day by Day symptom progression of Corona
Global Health & Infectious Disease Podcast
Non Contact Thermographu WIKI page
The significance of core temperature – Pathophysiology and measurement methods PDF
How testing failures allowed coronavirus to sweep the U.S.
Containment efforts, including screening airline passengers for fever, may have detected only one in three infected travelers arriving from overseas.
Trump Has Sabotaged America’s Coronavirus Response
As it improvises its way through a public health crisis, the United States has never been less prepared for a pandemic.
Cut $15 Billion national health care and global disease-fighting operating budgets of CDC, NSC, DHS and HHS in 2018...Homeland security infection disease team eliminated as well.
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